• 下面概念显示了集合中的完整项目以及这两个集合彼此进行内部联结外部联结之后剩下的项目。

    The following illustration shows a conceptual view of two sets and the elements within those sets that are included in either an inner join or a left outer join.

    youdao

  • 下面概念显示了集合中的完整项目以及这两个集合彼此进行内部联结外部联结之后剩下的项目。

    The following illustration shows a conceptual view of two sets and the elements within those sets that are included in either an inner join or a left outer join.

    youdao

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